[#transaction_identifier]
= transaction_identifier
:mrdocs:

transaction_identifier represents the two canonical transaction identifier types (txid, wtxid).

== Synopsis

Declared in `<primitives/transaction_identifier.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<bool has_witness>
class transaction_identifier;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:transaction_identifier/2constructor-0863.adoc[`transaction_identifier`]         [.small]#[constructor]#
| Constructors
| xref:transaction_identifier/GetHex.adoc[`GetHex`] 
| Returns the identifier as a hex string.
| xref:transaction_identifier/IsNull.adoc[`IsNull`] 
| Wrapped `uint256` methods.
| xref:transaction_identifier/Serialize.adoc[`Serialize`] 
| Serializes the wrapped value to a stream.
| xref:transaction_identifier/SetNull.adoc[`SetNull`] 
| Resets the identifier to its null value.
| xref:transaction_identifier/ToString.adoc[`ToString`] 
| Returns a human‐readable description of the identifier.
| xref:transaction_identifier/ToUint256.adoc[`ToUint256`] 
| Returns the underlying 256‐bit value.
| xref:transaction_identifier/Unserialize.adoc[`Unserialize`] 
| Unserializes the wrapped value from a stream.
| xref:transaction_identifier/begin.adoc[`begin`] 
| Returns an iterator to the first byte of the wrapped value.
| xref:transaction_identifier/data.adoc[`data`] 
| Returns a pointer to the first byte of the wrapped value.
| xref:transaction_identifier/end.adoc[`end`] 
| Returns an iterator past the last byte of the wrapped value.
| xref:transaction_identifier/operator_eq.adoc[`operator==`] 
| Compares two identifiers for equality.
| xref:transaction_identifier/operator_3way.adoc[`operator<=>`] 
| Orders two identifiers by their wrapped value.
|===


== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:transaction_identifier/FromHex.adoc[`FromHex`] 
| Builds an identifier by parsing a hex string.
| xref:transaction_identifier/FromUint256.adoc[`FromUint256`] 
| Builds an identifier from a raw 256‐bit value.
| xref:transaction_identifier/size.adoc[`size`] 
| Returns the identifier size in bytes.
|===



[.small]#Created with https://www.mrdocs.com[MrDocs]#